Paper-gumming machines



V Jan. 13, 1959 J. AUGERY ETAL 2,868,157 PAPER-GUMMING MACHINES Filed May 29, 1956 //v l/EN r0165 JEAN 4061567 gelwA/a 500/5357 United States Patent PAPER-GUMMIN G MACHINES Jean Augery, Paris, and Fernand Bouisset, Marseille, France, assignors to Societe Auonyme (lite: La Charfa, Paris, France Application May 29,1956, Serial No. 588,164

Claims priority, application France June 3, 1955 2 Claims. (c1. 118-8 Many difficulties are encountered in theiformation on a travelling paper band or sheet of a gummed or pasted strip parallel to the direction of travel of the paper and positioned at a "constantdistan'ce from one edge of the paper; in fact,"the paper band usually tends'to move slightly in the transverse 'dire'ction'and it is difiicult to make the gumrning device follow this displacement. Many solutions have already been proposed but insofar as the applicants are aware none of them seem to be completely satisfactory.

Accordingly to this invention it has been found that it is possible to form a gummed strip at a predetermined, unvarying distance from one of the longitudinal edges of the paper sheet to be gummed or pasted by utilizing this very edge for guiding the gumming device; this necessitates a mechanical or electrical device requiring but a very moderate or even no effort from the paper edge to be gummed for controlling the lateral displacement of the gumming device.

It is the essential object of this invention to provide a device of the general character set forth hereinabove which is characterized in that the shaft or shaft hub by which the gumming device is rotatably driven and along which this device is movable, comprises a number of rectilinear longitudinal grooves of semi-circular crosssection, cooperating with a corresponding number of balls maintained within these semi-circular grooves and adapted to roll therein.

In order to afford a clearer understanding of the invention and of the manner in which the same may be carried out in practice, reference will now be made to the accompanying drawing forming part of this specification and illustrating diagrammatically by way of example a typical embodiment of the invention. In the drawing:

Figure 1 is a complete although simplified view showing on a reduced scale the machine on which the gumming device of this invention is mounted.

Figures 2 and 3 are a side view and a front view respectively of the control arrangement of the device of this invention; and

Figures 4 and 5 are detail views showing on a larger scale in cross-section and longitudinal section respectively, the latter being taken upon the line V-V of Fig. 4, the mounting of the gumming device on its driving shaft.

The installation illustrated in the drawing comprises a number of cylinders and rollers, some of which are driving and other driven or acting as layshafts, the different paper sheets 1 passing successively over these cylinders and rollers finally forming a single sheet 3 made of several layers. The gumming disk 5 has its outer edge constantly fed with paste or like adhesive substance from the gumming or pasting roller 6 partly immersed in a container 4 filled with adhesive; this disk 5 is rotatably driven from the driving shaft 7, and one edge 8 of the paper band 2 to be gummed by the disk 5 is used ance.

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2 for positioning the disk 5 properly along its driving shaft 7.

For thispurpose a pin 9 carried by one end of a rod 10 is constantly urged by a light resilient pressure exerted by torsion spring 22 against the edge 8 of the paper sheet 2. Spring 22 is lightly loaded and is mounted upon'crank 11 with one end of spring 22 secured to the frame of the installation and the other end secured to crank 11 so as to bias crank 11 counterclockwise with respect to Figure 2. Rod 10 is rigidly connected to crank 11 having one arm 12 adapted to transmit, through the link 13, the movement of the edge 8 of the paper sheet to the arm 14 of a lever having its other arm 15 .driving shaft 7. These various members may be so dimensioned that the displacements of the disk 5 are the same as those of the edge 8 of the paper sheet. Thus, the disks will paste the paper band along a line 17 which is constantly located at the same distance from the edge 8 of "the sheet.

To avoid any difficulty, as well as the risk of deteriorating the edge of the paper sheet when this transverse displacement of the pasting device takes place, the following arrangement may be used: on the driving shaft 7 there is secured a large-size hub 16 having formed in its outer cylindrical surface a number of spaced longitudinal semi-circular grooves 18; the pasting disk 5 engages this hub only through the medium of balls 19, there being as many balls 19 as grooves 18; these balls are secured to the disk 5 by setting them between a pair of metal lugs 20 retaining the balls with a slight clear- Thus, these balls can rotate in, but are prevented from moving out of, the semi-circular grooves 18 by the inner peripheral edge 21 of the disk 5 which is engaged by these balls.

From the foregoing it is apparent that, since the balls 19 are free to roll within the grooves 18 the transverse displacement of the pasting disk 5 will require but a very moderate effort, so that any risk of damaging the edge of the paper sheet is definitely avoided.

On the other hand it will be readily understood that the manner in which the above-described transverse displacement of the pasting disks takes place is given by Way of example only and that many other devices may be used to this end without departing from the spirit and scope of the invention. This device for controlling the transverse displacement of a member relative to another member or shaft adapted to drive the former for rotation thereabout is also applicable to many other applications without departing from the principles on which this invention is based.

In modern paper-tube making machines the spool carrying devices are designed to permit the lateral displacement of the spools relative to the axis of the machine. Up to now the operator of this machine required remote-control equipment for producing this displacement through electric or hydraulic means. With the device described hereinabove this control can take place automatically; each movable pasting disk may actuate a pair of contacts disposed on either side of its initial position, these contacts actuating the electric or hydraulic system controlling the spool positions. Instead of using disks for co-acting with the contacts, any element of the paper-sheet control system may be used.

What we claim is:

1. A machine for pasting a moving paper sheet on a line at a constant distance from one edge of said paper sheet, comprising a driving shaft, a hub rigidly secured on the driving shaft, said hub having an outer cylindrical surface cut with a number of rectilinear longitudinal grooves, an annular pasting member having an outer periphery to paste the moving paper sheet and an inner periphery engageable around the outer cylindrical surface of the hub, cage means on said inner periphery of the annular pasting member, a plurality of balls rotatably carried by the annular pasting member in said cage means, said balls rotatably engaging said rectilinear longitudinal grooves and thus rigidly associating the annular pasting member in rotation with the hub and simultaneously permitting an easy sliding longitudinal movement of said annular pasting member on said hub and mechanical means co-acting with said one edge of the paper sheet and controlling the longitudinal movement of the an nular pasting member in a manner responsive to the longitudinal location of said edge relative to the hub.

2. A machine for pasting a moving paper sheet on a line at a constant distance from one edge of said paper sheet, comprising a driving shaft, a hub rigidly secured on the driving shaft, said hub having an outer cylindrical surface cut with a number of rectilinear longitudinal grooves, an annular pasting member having an outer periphery to paste the moving paper sheet and an inner periphery engageable around the outer cylindrical surface of the hub, cage means on said inner periphery of the annular pasting member, a plurality of balls rotatably carried by the annular pasting member in said cage means, said balls rotatably engaging said rectilinear longitudinal grooves and thus rigidly associating the annular pasting member in rotation with the hub and simultaneously permitting an easy sliding longitudinal movement of said annular pasting member on said hub, a rod having one of its ends provided with an integral pivot pin fulcrumed in fixed bearings, a pin carried by the other end of said rod and resiliently urged against said edge of the moving paper sheet and linkage means having one end actuated by said rod and the other end connected to the outer periphery of the annular pasting mem ber and controlling the longitudinal movement of said annular pasting member in a manner responsive to the longitudinal location of said edge with respect to the hub.

References Cited in the file of this patent UNITED STATES PATENTS 428,363 Arkell May 20, 1890 1,208,252 Westinghouse Dec. 12, 1916 2,438,787 Nicholas Mar. 30, 1948 2,695,205 Carden Nov. 23, 1954 

